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Engine Parts & Tuning Hardware

Unleash Your Engine's Power: Performance Parts & Accessories

At Optimiz Access, we offer a vast lineup of engine performance parts and accessories to boost the output of your sports vehicle or premium automobile. Optimize your engine for extreme performance and enjoy an exhilarating driving experience on both road and track.

Key benefits of engine tuning: substantial horsepower and torque gains for rapid acceleration, sharper throttle response, enhanced mechanical reliability using high-strength components, and tailored custom tuning suited to all engines.

Essential Products to Maximize Engine Performance

Discover all our precision-engineered components designed to increase efficiency and durability in your engine block:

  • Cold Air Intakes & Air Filtration – Performance sports filters and carbon intake systems for maximum air filling.
  • Intercoolers & Charge Coolers – Efficient intake air cooling to sustain consistent power output under heavy loads.
  • Forged Pistons & Connecting Rods – Heavy-duty internal components built to withstand extreme temperatures and boost pressures.
  • Turbos & Superchargers – Forced induction upgrades delivering significant power increases.
  • Ignition & Servicing – Competition spark plugs, high-output ignition coils, and high-performance oil filters.

Industry-Leading Benchmark Brands

We stock top tuning and motorsport manufacturers: Wagner Tuning, Forge Motorsport, Magnecor, Green Filter, BMC Filter, NGK, Vibra Technics, and Powerflex. We also supply OEM factory parts to ensure meticulous engine maintenance.

Why you should Choose Optimiz Access for Your Engine Upgrades

Since 2010, Optimiz Access has specialized in selecting top-tier engine components for the custom upgrading and maintenance of sports vehicles. Located in northern France (Hauts-de-France) — near Lille, Valenciennes, Cambrai, Arras, Seclin, Douai, and Saint-Quentin —, our expert technicians guide your hardware selection and provide professional installation in our workshop. We ensure strict quality control along with fast worldwide shipping.

Unleash Your Engine's Full Potential Today

Give your car the raw power and sharp response it deserves. Trust the expertise of Optimiz Access, select your engine performance parts today, and benefit from our fast dispatch.

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  • Categories: Alimentation
  • Categories: Circuit d'eau
  • Categories: Entretien
  • Categories: Suralimentation (Turbo)
Bidon de 5L de ELF HTX Collection 20w50ELF HTX Collection 20w50 5L - Porsche & Alpine Classic
      Protect the original powertrain of your automotive icon with ELF HTX Collection 20w50 mineral engine oil in a 5L jug . Specifically formulated for vintage mechanics and classic historic engines, this high-end formula guarantees consistent oil pressure and unmatched...
      €63.62Price
      Bidon de 5L de ELF HTX Collection 20w50ELF HTX Collection 20w50 5L - Porsche & Alpine Classic
          Protect the original powertrain of your automotive icon with ELF HTX Collection 20w50 mineral engine oil in a 5L jug . Specifically formulated for vintage mechanics and classic historic engines, this high-end formula guarantees consistent oil pressure and unmatched...
          €63.62Price
          En Stock
          €221.33 Price
          En Stock
          €221.33 Price
          Radiator Outlet Water Hose Renault Megane 3 RSRadiator Outlet Water Hose Renault Megane 3 RS
              Genuine Renault Radiator Outlet Water Hose for Renault Megane 3 RS. Essential part for optimal engine cooling. Renault quality and reliability.
              €221.33Price
              Radiator Outlet Water Hose Renault Megane 3 RSRadiator Outlet Water Hose Renault Megane 3 RS
                  Genuine Renault Radiator Outlet Water Hose for Renault Megane 3 RS. Essential part for optimal engine cooling. Renault quality and reliability.
                  €221.33Price
                  En Stock
                  €84.00 Price
                  En Stock
                  €84.00 Price
                  Original RENAULT Injector for Megane 3 RSOriginal RENAULT Injector for Megane 3 RS
                      Don't let your Renault Megane 3 RS lose its vigor! This original RENAULT injector is essential for maintaining your engine's optimal performance. Avoid excessive fuel consumption and a drop in power by choosing the quality and reliability of a part specifically designed for your sports vehicle. You can find associated complementary products (notably the...
                      €84.00Price
                      Original RENAULT Injector for Megane 3 RSOriginal RENAULT Injector for Megane 3 RS
                          Don't let your Renault Megane 3 RS lose its vigor! This original RENAULT injector is essential for maintaining your engine's optimal performance. Avoid excessive fuel consumption and a drop in power by choosing the quality and reliability of a part specifically designed for your sports vehicle. You can find associated complementary products (notably the...
                          €84.00Price
                          En Stock
                          €43.02 Price
                          En Stock
                          €43.02 Price
                          Joint Spy Vilebrequin coté distribution
                              The original Renault crankshaft oil seal, timing side is an essential part to ensure crankshaft sealing in the engines of your Renault Clio 2 RS , Clio 2 GR N , Clio 2 X65 Cup , Clio 3 RS , Clio R3 , Clio 3 X85 Cup , Mégane 2 RS , Mégane 3 RS , and...
                              €43.02Price
                              Joint Spy Vilebrequin coté distribution
                                  The original Renault crankshaft oil seal, timing side is an essential part to ensure crankshaft sealing in the engines of your Renault Clio 2 RS , Clio 2 GR N , Clio 2 X65 Cup , Clio 3 RS , Clio R3 , Clio 3 X85 Cup , Mégane 2 RS , Mégane 3 RS , and...
                                  €43.02Price
                                  Joint répartiteur admission ( plenum ) Twingo 2 RS, R1 et R2
                                      Joint répartiteur admission Twingo RS R1 et R2
                                      €26.36Price
                                      Joint répartiteur admission ( plenum ) Twingo 2 RS, R1 et R2
                                          Joint répartiteur admission Twingo RS R1 et R2
                                          €26.36Price
                                          En Stock
                                          €689.93 Price
                                          En Stock
                                          €689.93 Price
                                          Durite inférieure radiateur Clio 2 Rs et Cup
                                              Durite inférieure radiateur Clio 2 Cup Référence: 7711155360
                                              €689.93Price
                                              Durite inférieure radiateur Clio 2 Rs et Cup
                                                  Durite inférieure radiateur Clio 2 Cup Référence: 7711155360
                                                  €689.93Price
                                                  Dispo selon configuration
                                                  €63.30 €74.47 Regular price -15% off Price
                                                  Dispo selon configuration
                                                  €63.30 €74.47 Regular price -15% off Price
                                                  Complete Engine Oil Change Kit for Renault Megane 3 RS (ELF 5W40 Oil & Renault Filter)Complete Engine Oil Change Kit for Renault Megane 3 RS (ELF 5W40 Oil & Renault Filter)
                                                    • Pack
                                                    Ensure the longevity and performance of your Renault Megane 3 RS with our complete oil change kit . It includes 6 liters of ELF SRX 5W40 oil (the oil recommended by the manufacturer during vehicle development), a genuine Renault oil filter , and the drain plug gasket . Essential for optimal...
                                                    €63.30€74.47Regular price-15% offPrice
                                                    Complete Engine Oil Change Kit for Renault Megane 3 RS (ELF 5W40 Oil & Renault Filter)Complete Engine Oil Change Kit for Renault Megane 3 RS (ELF 5W40 Oil & Renault Filter)
                                                      • Pack
                                                      Ensure the longevity and performance of your Renault Megane 3 RS with our complete oil change kit . It includes 6 liters of ELF SRX 5W40 oil (the oil recommended by the manufacturer during vehicle development), a genuine Renault oil filter , and the drain plug gasket . Essential for optimal...
                                                      €63.30€74.47Regular price-15% offPrice
                                                      Dispo selon configuration
                                                      €65.11 Price
                                                      Dispo selon configuration
                                                      €65.11 Price
                                                      T de raccord de Dump Megane 2 RS
                                                          T de marque Forge pour le raccord de Dump Valve (Diametre de liaison 25mm)
                                                          €65.11Price
                                                          T de raccord de Dump Megane 2 RS
                                                              T de marque Forge pour le raccord de Dump Valve (Diametre de liaison 25mm)
                                                              €65.11Price
                                                              En Stock
                                                              €12.00 Price
                                                              En Stock
                                                              €12.00 Price
                                                              Bidon de 2 L ELF 700 ST 10w40Bidon de 2 L ELF 700 ST 10w40
                                                                  Bidon de 2L de ELF 700 ST 10W40 Huile Préconisé par Renault l'entretien de la gamme RS comprenant Clio 16S et Williams, Twingo RS, Clio RS, Megane RS..
                                                                  €12.00Price
                                                                  Bidon de 2 L ELF 700 ST 10w40Bidon de 2 L ELF 700 ST 10w40
                                                                      Bidon de 2L de ELF 700 ST 10W40 Huile Préconisé par Renault l'entretien de la gamme RS comprenant Clio 16S et Williams, Twingo RS, Clio RS, Megane RS..
                                                                      €12.00Price
                                                                      Durites de Reniflard et Wasegate Megane 2 RS
                                                                          Durites De reniflard Renforcées pour toutes Megane 2 RS. Produit de la marque Samco Sport Le kit est composé de 4 pièces.
                                                                          €82.00Price
                                                                          Durites de Reniflard et Wasegate Megane 2 RS
                                                                              Durites De reniflard Renforcées pour toutes Megane 2 RS. Produit de la marque Samco Sport Le kit est composé de 4 pièces.
                                                                              €82.00Price
                                                                              Reinforced silicone intercooler boost hose kit Forge Motorsport FMKTRC for Renault Clio 4 RS. black
                                                                                  Prevent boost pressure leaks and protect your intake system with the premium Forge Motorsport Silicon Turbo Hose Kit FMKTRC for Clio 4 RS . Manufactured from high-tensile, multi-layer reinforced silicone, this kit directly replaces factory rubber lines that are prone to...
                                                                                  €230.39Price
                                                                                  Reinforced silicone intercooler boost hose kit Forge Motorsport FMKTRC for Renault Clio 4 RS. black
                                                                                      Prevent boost pressure leaks and protect your intake system with the premium Forge Motorsport Silicon Turbo Hose Kit FMKTRC for Clio 4 RS . Manufactured from high-tensile, multi-layer reinforced silicone, this kit directly replaces factory rubber lines that are prone to...
                                                                                      €230.39Price
                                                                                      En Stock
                                                                                      €139.18 €231.97 Regular price -40% off Price
                                                                                      En Stock
                                                                                      €139.18 €231.97 Regular price -40% off Price
                                                                                      Kit Distribution Clio 1.8 16S et WilliamsKit Distribution Clio 1.8 16S et Williams
                                                                                          Kit distribution Renault pour Clio 1.8 16S Le kit contient la courroie et les 2 galets En cas de doute nous consulter.
                                                                                          €139.18€231.97Regular price-40% offPrice
                                                                                          Kit Distribution Clio 1.8 16S et WilliamsKit Distribution Clio 1.8 16S et Williams
                                                                                              Kit distribution Renault pour Clio 1.8 16S Le kit contient la courroie et les 2 galets En cas de doute nous consulter.
                                                                                              €139.18€231.97Regular price-40% offPrice
                                                                                              En Stock
                                                                                              €23.50 Price
                                                                                              En Stock
                                                                                              €23.50 Price
                                                                                              Kit Revision Dump Valve Recirculation Forge
                                                                                                  Kit revision pour Dump Valve Forge comprenant: - 1 sachet de graisse - un piston - joints toriques 
                                                                                                  €23.50Price
                                                                                                  Kit Revision Dump Valve Recirculation Forge
                                                                                                      Kit revision pour Dump Valve Forge comprenant: - 1 sachet de graisse - un piston - joints toriques 
                                                                                                      €23.50Price
                                                                                                      Genuine Renault Sport throttle position potentiometer for Twingo R2, Clio R3, and X85 Cup racing engines.
                                                                                                          Do not risk unpredictable ignition cuts during a rally stage, a sudden loss of immediate throttle response, or an abrupt limp-mode activation that freezes your lap times on track. The genuine Potentiomètre papillon Twingo R2, Clio R3 et X85 Cup is the official factory-spec...
                                                                                                          €138.05Price
                                                                                                          Genuine Renault Sport throttle position potentiometer for Twingo R2, Clio R3, and X85 Cup racing engines.
                                                                                                              Do not risk unpredictable ignition cuts during a rally stage, a sudden loss of immediate throttle response, or an abrupt limp-mode activation that freezes your lap times on track. The genuine Potentiomètre papillon Twingo R2, Clio R3 et X85 Cup is the official factory-spec...
                                                                                                              €138.05Price
                                                                                                              DeatschWerks 265L/H Fuel Pump (E85) for Renault Megane 2 RS
                                                                                                                  Secure your engine build with the DeatschWerks DW65c fuel pump , delivering a high-performance flow rate of 265L/H . Specifically engineered for the Renault Megane 2 RS , this pump offers the major advantage of being 100% E85 compatible (ethanol), making it the perfect choice for flex-fuel conversions. Its compact design allows...
                                                                                                                  €224.09Price
                                                                                                                  DeatschWerks 265L/H Fuel Pump (E85) for Renault Megane 2 RS
                                                                                                                      Secure your engine build with the DeatschWerks DW65c fuel pump , delivering a high-performance flow rate of 265L/H . Specifically engineered for the Renault Megane 2 RS , this pump offers the major advantage of being 100% E85 compatible (ethanol), making it the perfect choice for flex-fuel conversions. Its compact design allows...
                                                                                                                      €224.09Price
                                                                                                                      En Stock
                                                                                                                      €251.47 Price
                                                                                                                      En Stock
                                                                                                                      €251.47 Price
                                                                                                                      Kit Joint Refection moteur Origine Megane 3 RSKit Joint Refection moteur Origine Megane 3 RS
                                                                                                                          Ensemble de joints nécessaire au bon remontage du moteur de Megane 3 RS Véritable produit d'origine
                                                                                                                          €251.47Price
                                                                                                                          Kit Joint Refection moteur Origine Megane 3 RSKit Joint Refection moteur Origine Megane 3 RS
                                                                                                                              Ensemble de joints nécessaire au bon remontage du moteur de Megane 3 RS Véritable produit d'origine
                                                                                                                              €251.47Price
                                                                                                                              Dispo selon configuration
                                                                                                                              €169.00 €209.02 Regular price -€40.02 off Price
                                                                                                                              Dispo selon configuration
                                                                                                                              €169.00 €209.02 Regular price -€40.02 off Price
                                                                                                                              COLD SIDE Clio 4 RS (conduit d'air renforcé)Uprated Cold Side Boost Pipe Kit - Renault Clio 4 RS
                                                                                                                                • Pack
                                                                                                                                Protect your turbocharging system against pressure drops with the high-performance Cold Side Kit for the Renault Clio 4 RS (Uprated Air Guide Pipe) . This reinforced intake hose replaces the fragile factory plastic pipe that is prone to cracking, optimizing cold airflow...
                                                                                                                                €169.00€209.02Regular price-€40.02 offPrice
                                                                                                                                COLD SIDE Clio 4 RS (conduit d'air renforcé)Uprated Cold Side Boost Pipe Kit - Renault Clio 4 RS
                                                                                                                                  • Pack
                                                                                                                                  Protect your turbocharging system against pressure drops with the high-performance Cold Side Kit for the Renault Clio 4 RS (Uprated Air Guide Pipe) . This reinforced intake hose replaces the fragile factory plastic pipe that is prone to cracking, optimizing cold airflow...
                                                                                                                                  €169.00€209.02Regular price-€40.02 offPrice
                                                                                                                                  Motul 300V Competition 5W40 2L Engine Oil - RS, Audi, VW, Porsche, Mercedes (Racing)
                                                                                                                                      Motul 300V Competition Engine Oil 5W40 2L - Ultimate Performance for Racing Don't let your competition vehicle's performance be compromised. engine oil is the ultimate choice for maximum protection and unmatched track performance. Specifically developed formula for extreme racing demands. 2-liter can. Also discover our...
                                                                                                                                      €39.99Price
                                                                                                                                      Motul 300V Competition 5W40 2L Engine Oil - RS, Audi, VW, Porsche, Mercedes (Racing)
                                                                                                                                          Motul 300V Competition Engine Oil 5W40 2L - Ultimate Performance for Racing Don't let your competition vehicle's performance be compromised. engine oil is the ultimate choice for maximum protection and unmatched track performance. Specifically developed formula for extreme racing demands. 2-liter can. Also discover our...
                                                                                                                                          €39.99Price
                                                                                                                                          En Stock
                                                                                                                                          €3.00 Price
                                                                                                                                          En Stock
                                                                                                                                          €3.00 Price
                                                                                                                                          Joint bimatiere 16mm
                                                                                                                                              The 16mm bimaterial gasket provides a reliable and durable sealing solution, suitable for various industrial, automotive, and domestic applications . Made from robust materials, it ensures a precise fit, easy installation, and optimal performance even under demanding conditions such as high temperatures and pressures.
                                                                                                                                              €3.00Price
                                                                                                                                              Joint bimatiere 16mm
                                                                                                                                                  The 16mm bimaterial gasket provides a reliable and durable sealing solution, suitable for various industrial, automotive, and domestic applications . Made from robust materials, it ensures a precise fit, easy installation, and optimal performance even under demanding conditions such as high temperatures and pressures.
                                                                                                                                                  €3.00Price
                                                                                                                                                  Joint spy vilebrequin côté distribution Twingo RS y compris R1 et R2
                                                                                                                                                      Joint spy vilebrequin côté distribution Twingo RS y compris R1 et R2
                                                                                                                                                      €33.94Price
                                                                                                                                                      Joint spy vilebrequin côté distribution Twingo RS y compris R1 et R2
                                                                                                                                                          Joint spy vilebrequin côté distribution Twingo RS y compris R1 et R2
                                                                                                                                                          €33.94Price
                                                                                                                                                          En Stock
                                                                                                                                                          €12.78 Price
                                                                                                                                                          En Stock
                                                                                                                                                          €12.78 Price
                                                                                                                                                          Tuyau essence vapeur canister Ø8 Megane N4Tuyau essence vapeur canister Ø8 Megane N4
                                                                                                                                                              Tuyau essence vapeur canister Ø8 Megane N4 Référence: 7711167251
                                                                                                                                                              €12.78Price
                                                                                                                                                              Tuyau essence vapeur canister Ø8 Megane N4Tuyau essence vapeur canister Ø8 Megane N4
                                                                                                                                                                  Tuyau essence vapeur canister Ø8 Megane N4 Référence: 7711167251
                                                                                                                                                                  €12.78Price
                                                                                                                                                                  Joint cuivre de banjo d'alimentation de rampe Twingo R1 et R2
                                                                                                                                                                      Joint cuivre de banjo d'alimentation de rampe Twingo R1 et R2 Référence: 7711050937
                                                                                                                                                                      €3.04Price
                                                                                                                                                                      Joint cuivre de banjo d'alimentation de rampe Twingo R1 et R2
                                                                                                                                                                          Joint cuivre de banjo d'alimentation de rampe Twingo R1 et R2 Référence: 7711050937
                                                                                                                                                                          €3.04Price
                                                                                                                                                                          Durite d'induction (admission) Forge Motorsport Megane 4 RSDurite d'induction (admission) Forge Motorsport Megane 4 RS
                                                                                                                                                                              Durite d'induction (admission) Forge Motorsport Megane 4 RS Produit de qualité permettant de limiter les perturbations.
                                                                                                                                                                              €118.31Price
                                                                                                                                                                              Durite d'induction (admission) Forge Motorsport Megane 4 RSDurite d'induction (admission) Forge Motorsport Megane 4 RS
                                                                                                                                                                                  Durite d'induction (admission) Forge Motorsport Megane 4 RS Produit de qualité permettant de limiter les perturbations.
                                                                                                                                                                                  €118.31Price
                                                                                                                                                                                  Kit durites de turbo Forge Motorsport Megane 4 RSForge Motorsport Turbo Hose Kit - Renault Megane 4 RS
                                                                                                                                                                                      Secure your boost pressure consistency and eliminate intake charge drops with the high-performance Forge Motorsport Turbo Hose Kit for the Renault Megane 4 RS . This premium set of uprated silicone boost couplers replaces the restrictive factory rubber lines to optimize...
                                                                                                                                                                                      €294.76Price
                                                                                                                                                                                      Kit durites de turbo Forge Motorsport Megane 4 RSForge Motorsport Turbo Hose Kit - Renault Megane 4 RS
                                                                                                                                                                                          Secure your boost pressure consistency and eliminate intake charge drops with the high-performance Forge Motorsport Turbo Hose Kit for the Renault Megane 4 RS . This premium set of uprated silicone boost couplers replaces the restrictive factory rubber lines to optimize...
                                                                                                                                                                                          €294.76Price
                                                                                                                                                                                          En Stock
                                                                                                                                                                                          €202.12 Price
                                                                                                                                                                                          En Stock
                                                                                                                                                                                          €202.12 Price
                                                                                                                                                                                          Isolant Tablier Clio 2 RS
                                                                                                                                                                                              Genuine Renault Bulkhead Insulator for Clio 2 RS and Clio 2 Gr N. Reduce noise and protect your engine compartment with this high-quality insulator. Don't forget the necessary clips and fasteners for optimal installation (available at the bottom of the page).
                                                                                                                                                                                              €202.12Price
                                                                                                                                                                                              Isolant Tablier Clio 2 RS
                                                                                                                                                                                                  Genuine Renault Bulkhead Insulator for Clio 2 RS and Clio 2 Gr N. Reduce noise and protect your engine compartment with this high-quality insulator. Don't forget the necessary clips and fasteners for optimal installation (available at the bottom of the page).
                                                                                                                                                                                                  €202.12Price